Academic literature on the topic 'Emission, rail traffic'

The traffic management is the core of the railway operations control technology. It receives the timetable information as a target definition and advises the command control and signaling systems to execute the rail traffic. Hence the traffic management system (TMS) has to take into account many sources of requests towards the traffic operation e.g. coming from the maintenance planning or the power supply system and to optimize the operation with respect to many criteria as e.g. punctuality, energy consumption, capacity and infrastructure wear. This chapter shows the sources of information for the TMS as well the resulting criteria. The final approach to configure a specific has to be done with respect to a specific application.

The Alameda Corridor rail project became a tale of two cities: Los Angeles and Long Beach, California. It started as a story including each of the six cities in between. The Alameda Corridor Transportation Authority transformed a tangled web of rail lines, each owned and operated by three competing railroads, into one line. The new corridor created public value in eliminating grade rail crossing that backed up truck and car traffic in six mid-corridor cities, and through the reduction of air pollution emissions and groundwater contamination. The line moved the harbours from reliance on nineteenth-century rail technology to a twenty-first-century system aligned with the technology needed to compete in a globalized goods movement world. Public expense was significantly reduced as the line was built primarily with private sector debt financing, which was paid off by fees on private sector container cargo. The move to governance by only the cities of Long Beach and Los Angeles contained costs and kept the project on time to reduce the financial uncertainty that would have adversely affected the costs of borrowing. This efficient decision-making structure based on those with a financial stake in cost containment came at the expense of participation in decision-making by mid-corridor cities.

Giving priority to public transport vehicles at traffic signals is one of the traffic management strategies deployed at emerging smart cities to increase the quality of service for public transit users. It is a key to breaking the vicious cycle of congestion that threatens to bring cities into gridlock. In that cycle, increasing private traffic makes public transport become slower, less reliable, and less attractive. This results in deteriorated transit speed and reliability and induces more people to leave public transit in favor of the private cars, which create more traffic congestion, generate emissions, and increase energy consumption. Prioritizing public transit would break the vicious cycle and make it a more attractive mode as traffic demand and urban networks grow. A traditional way of protecting public transit from congestion is to move it either underground or above ground, as in the form of a metro/subway or air rail or create a dedicated lane as in the form of bus lane or light rail transit (LRT). However, due to the enormous capital expense involved or the lack of right-of-way, these solutions are often limited to few travel corridors or where money is not an issue. An alternative to prioritizing space to transit is to prioritize transit through time in the form of Transit Signal Priority (TSP). Noteworthy, transit and specifically bus schedules are known to be unstable and can be thrown off their schedule with even small changes in traffic or dwell time. At the same time, transit service reliability is an important factor for passengers and transit agencies. Less variability in transit travel time will need less slack or layover time. Thus, transit schedulers are interested in reducing transit travel time and its variability. One way to reach this goal is through an active intervention like TSP. In this chapter a comprehensive review of transit signal priority models is presented. The studies are classified into different categories which are: signal priority and different control systems, passive versus active priority, predictive transit signal priority, priority with connected vehicles, multi-modal signal priority models, and other practical considerations.

Abstract Due to historical ground movement, increased traffic levels, and general degradation, this important road and rail bridge which provides an essential link between the interior of the country and the Port of Abidjan, required significant repair and reinforcement. This included strengthening the pre-stressed concrete box girders and replacement of the piled foundations. Replacement piles had to be adjacent to, and no longer than, the existing piles to not compromise the stability of the operational bridge during the works. The underlying geology, however, meant that the pile loads had t